test/IRGen/upcast.sil

// RUN: %target-swift-frontend %s -emit-ir | %FileCheck %s

// Make sure that we are able to lower upcast addresses.

// CHECK-LABEL: define{{( protected)?}} void @upcast_test(%C6upcast1D** nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK-NEXT: bitcast %C6upcast1D** {{%[0-0]+}} to %C6upcast1C**
// CHECK-NEXT: ret void

class C {}
sil_vtable C {}
class D : C {}
sil_vtable D {}

sil @upcast_test : $@convention(thin) (@inout D) -> () {
bb0(%0 : $*D):
  %1 = upcast %0 : $*D to $*C
  %33 = tuple()
  return %33 : $()
}